Corn-grinder.



- No. 758,068. PATENTED APR. 26, 1904. M. H. HATFIELD.

CORN GRINDER.

APPLIOATION FILED JULY 1, 1903.

N0 MODEL.

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UNITED STATES Patented April 26, 1904.

PATENT OFFICE.

CORN-GRINDER.

EEEGIFIGATION forming part of Letters Patent No. 758,068, dated April 26, 1904.

Application filed July 1, 1903. Serial No. 163,910. (No model.)

To all whmn it may concern.-

Be it known that I, MARTIN H. HATFIELD, a citizen of the United States, residing at Harriman, in the county of Roane, State of Tennessee, have invented certain new and useful Improvements in Corn-Grinders; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to mills, and more particularly to that class designed for grinding corn and similar. grains, the object of the invention being to provide a construction wherein the spindle will have bearings above and below the stones only, so that ready access thereto for oiling may be had, a further object of the invention being to overcome the objectionable features of a bearing within either stone.

In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure 1 is a vertical section through a mill embodying the invention. Fig. 2 is a perspective View showing the hanger for the upper or rotatable stone with the spindle.

Referring now to the drawings, there is shown a mill embodying a frame including a base 5, having the uprights 6, which support the bridge-tree 7. Upon the base is mounted the lower millstone 8 which is stationary and through the center of which is the usual opening 9, through which is passed the spindle 10.

The opening9 of thelower stone of the mill is provided with a bushing 11, the upper end of which is reduced in diameter and projects above the upper surface of the stone, the upper end of the bushing being covered by the cap 12, which prevents the grain from passing down through the bushing.

The spindle 10 has a bearing 13 upon the bridge-tree and has also a bearing 1A upon the beam 15 below the lower stone, both of which bearings are readily accessible for oiling and which hold the spindle out of contact with and centrally of the bushing.

The upper stone 16 of the mill is carried by ahanger which consists of acircular frame 17, from diametrically opposite points of relative to the lower stone and that'it will rotate properly with respect to the lower stone.

In practice modifications of the specific construction shown may be made, and any suitable materials and proportions may be used for the various parts without departing from the spirit of the invention.

What is claimed is A mill comprising a lower stone having a central tapering opening, a bushing engaged in the opening, tapering and projecting thereabove, a shaftpassed freely through the bush- .ing and out of contact therewith, said shaft having a reduced portion and a shoulder formed by the said reduced portion, a cover disposed over the upper end of the bushing and attached to the shaft, bearings for the shaft above and below the stone, an upper stone having a central cylindrical opening, a circular frame engaged in the upper portion of the cylindrical opening, the frame having perforations and depending arms at diametrically opposite points respectively, the lower ends of the arms being turned outwardly to form supports for the upper stone, and abar passing through the perforations in the circular frame and having an opening in its central portion, the said bar being mounted upon the reduced portion of the shaft and against the shoulder formed by the said-reduced portion.

In testimony whereof I affiX my signature in presence of two witnesses.

MARTIN H. HATFIELD. Witnesses:

E. C. Ronun'rs, J r., JOSEPH E. HATFIELD 

